As China's largest and most significant ancient palace, The Forbidden City is the best preserved one. Currently, it serves as China's Palace Museum. This magnificent palace, located in the center of Beijing city, was built in 1406 and completed in 1420. In the past, it used to be the imperial residence for 24 emperors of Ming and Qing dynasties. The Forbidden City, the best representative of Chinese civilization, is considered a holy place by Chinese people. The palace covers an area of over 2,350,000 square feet. It has 9,999 rooms built in traditional architectural style. Ten-foot-high walls surround the palace, reinforced by deep moat and tall observation towers. The Hall of Supreme Harmony, the Hall of Middle Harmony, and the Hall of Preserving Harmony are at the center of this awe-inspiring palatial complex. The Hall of Supreme Harmony is famous as a lama temple. These three halls divide this world-famous building complex along a north-south and east-west axis. The outside of palace complex is Tian'anmen Square, the largest city square in the world.